منابع مشابه
The Tortoise and the Hare Restart GMRES
When solving large nonsymmetric systems of linear equations with the restarted GMRES algorithm, one is inclined to select a relatively large restart parameter in the hope of mimicking the full GMRES process. Surprisingly, cases exist where small values of the restart parameter yield convergence in fewer iterations than larger values. Here, two simple examples are presented where GMRES(1) conver...
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There has been much talk in recent years of devolving powers and functions from the federal government to the states. Some observers even proclaim a “devolution revolution” (Nathan 1996), the result of which will be a more efficient and effective federal government and more robust and responsive states. The generally recognized objectives of devolution include (1) more efficient provision and p...
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ژورنال
عنوان ژورنال: SIAM Review
سال: 2003
ISSN: 0036-1445,1095-7200
DOI: 10.1137/s003614450139961